Cech reveals reason behind tight Arsenal defence
![Cech reveals reason behind tight Arsenal defence](http://static.goal.com/2111600/2111602_gallery.jpg)
![HD Petr Cech, Per Mertesacker, Arsenal vs Bayern Munich HD Petr Cech, Per Mertesacker, Arsenal vs Bayern Munich](http://static.goal.com/2111600/2111602_thumb.jpg)
The goalkeeper has indicated his communication tricks ensure Arsenal's defence remains watertight as they look to consolidate their position at the top of the table
The goalkeeper has indicated his communication tricks ensure Arsenal's defence remains watertight as they look to consolidate their position at the top of the table